MACROMOLECULAR DESIGN FOR OPTICAL RESOLUT ION MEMBRANE

Several new polymers for optical resolution membranes were synthesized and enantioselective permeabilities of the polymer membranes were exa mind for various racemates using four methods, that is, concentration driven permeation (CP), pressure-driven permeation (Delta P), pervapor ation (PV), and evapomeation (EV). (+)-Poly (1-(dimethyl (10-pinanyl) silyl)-1-propyne) ((+)-poly (DPSP)) membranes showed high enantioselec tive permeabilities in CP for various racemates and low permeation rat es, which were improved by using PV or EV. (-)-Poly (2-(dimethyl (10-p inanyl) silyl) norbornadiene) had a higher permeability than (+)-poly (DPSP). Polymers having a chiral main chain showed poor enantioselecti ve permeability. Highly and stably enantioselective permeations were o bserved through the blend membranes whose surface were modified by (-) -oligo-(methyl (10-pinanyl) siloxane((-)-OMPS). The graft copolymers w ith (-)-OMPS as the grafts are promising for a higher performance memb rane.